DWS 160 VSD+Pumping speed 160 m³/hUltimate pressure 0.01 mbar
DWS 250 VSD+ 3Ph 380-460 V 50/60 Hz
The Atlas Copco DWS 250 VSD+ is a variable-speed dry screw vacuum pump with a pumping speed of up to 250 m³/h and an ultimate pressure of 1 × 10⁻² mbar. The integrated frequency inverter matches the speed to the process and saves energy. Ehrler & Beck advises on sizing and accessories.
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- Pumping speed 250 m³/h 50 Hz 250 m³/h 60 Hz
- Ultimate pressure 0.01 mbar
- Rated motor power 7.5 kW 50 Hz 7.5 kW 60 Hz
| Variant | Part number |
|---|---|
| 3Ph 380-460 V 50/60 Hz (selected) | 1950813607 |
Atlas Copco DWS 250 VSD+ – compact screw pump with VSD+
The DWS 250 VSD+ reaches a pumping speed of up to 250 m³/h and an ultimate pressure of 1 × 10⁻² mbar(a). At ultimate pressure it draws 4 kW, at full pumping capacity 7.7 kW; the installed power is 7.5 kW. Dimensions 1265 × 520 × 566 mm (L × W × H), weight 315 kg, inlet DN 63 ISO-F, outlet DN 40 ISO-KF. The sound pressure level is below 64 dB(A).Variable speed drive saves energy
The frequency inverter controls the speed according to the vacuum required. With a varying load this reduces the energy demand; the compact design makes transport and installation easier. For more pumping speed there are the combinations DWS 160/1750 VSD+ and DWS 250/2600 VSD+ with a Roots pump mounted on top.Applications of the range
Atlas Copco lists battery manufacturing, the electrical industry, CO₂ capture, food packaging, and plastics processing and recycling.Version
Ehrler & Beck lists the DWS 250 VSD+ under part number 1950813607 for 380–460 V at 50 or 60 Hz. Atlas Copco marks the performance data as preliminary.Features of the DWS VSD+ range
- Integrated frequency inverter (VSD+): The speed follows the process; setpoint and speed control save energy under varying load
- Dry pumping chamber, gearbox protected against contamination, bearings with special low-vapour-pressure oil (PFPE)
- Rotors supported at both ends (no overhung bearings): fast start, very low vibration
- Constant-flow water cooling, gas ballast adjustable by hand, non-contact long-life seals
- Elektronikon® controller with remote monitoring; I/O, fieldbus and IoT connectivity
- Compact metal housing, fully wired and ready to connect (plug and play)
| Pumping speed 50Hz | 250 |
|---|---|
| Pumping speed 60Hz | 250 |
| Ultimate pressure | 0.01 |
| Rated motor power 50Hz | 7.5 |
| Rated motor power 60Hz | 7.5 |
| Weight | 315 |
| Length | 126.5 |
| Width | 52 |
| Height | 56.6 |
| Inlet connection flange | DN 63 ISO-F |
| Outlet connection flange | DN 40 ISO-KF |
| Noise level | 64 dB(A) |
| Cooling method | Water cooling |
| Oil type | PFPE |
Additional technical data
| Technical data | Value |
|---|---|
| Design | Dry screw vacuum pump, variable-speed (VSD+) |
| Max. pumping speed | 250 m³/h |
| Ultimate pressure | 1 × 10⁻² mbar(a) |
| Power consumption at ultimate pressure / at max. pumping capacity | 4 / 7.7 kW |
| Rated motor power | 7.5 kW |
| Mains connection | 3Ph 380-460 V 50/60 Hz |
| Sound pressure level | < 64 dB(A) |
| Cooling | Water |
| Cooling water | Connection 3/8" BSP male, 4 l/min, max. 6.9 bar, min. 1 bar differential pressure, 5 to 40 °C |
| Barrier gas (purge) | Connection 1/2" BSP male, 2.5 to 6.9 bar, shaft seal purge 12 l/min |
| Gas ballast | 0 to 50 l/min |
| Bearing lubrication | PFPE Drynert 25/6 |
| Max. exhaust back pressure | 1.2 bar(a) |
| Ambient temperature | 5 to 40 °C |
| Dimensions L × W × H | 1265 × 520 × 566 mm |
| Weight | 315 kg |
| Inlet / outlet | DN 63 ISO-F / DN 40 ISO-KF |
| Data as of | preliminary data according to the Atlas Copco data sheet (05/2022) |
DWS 160 VSD+Pumping speed 160 m³/hUltimate pressure 0.01 mbarDWS 450 VSD+Pumping speed 450 m³/hUltimate pressure 0.01 mbarDWS 750 VSD+Pumping speed 740 m³/hUltimate pressure 0.01 mbarDWS 160/1750 VSD+Pumping speed 1,200 m³/hUltimate pressure 1 × 10-3 mbarDWS 250/2600 VSD+Pumping speed 1,900 m³/hUltimate pressure 1 × 10-3 mbar